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Nolan, Lee
Publications (10 of 31) Show all publications
Li, Y., Simpson, K. J., Nolan, L., Miller, M. & Johnson, B. (2018). Lower extremity kinematics of curve sprinting displayed by runners using a transtibial prosthesis. Journal of Sports Sciences, 36(3), 293-302
Open this publication in new window or tab >>Lower extremity kinematics of curve sprinting displayed by runners using a transtibial prosthesis
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2018 (English)In: Journal of Sports Sciences, ISSN 0264-0414, E-ISSN 1466-447X, Vol. 36, no 3, p. 293-302Article in journal (Refereed) Published
Abstract [en]

The purpose of the study was to determine if the kinematics exhibited by skilled runners wearing a unilateral, transtibial prosthesis during the curve section of a 200-m sprint race were influenced by interaction of limb-type (prosthetic limb (PROS-L) vs. nonprosthetic limb (NONPROS-L)) and curve-side (inside and outside limb relative to the centre of the curve). Step kinematics, toe clearance and knee and hip flexion/extension, hip ab/adduction for one stride of each limb were generated from video of 13 males running the curve during an international 200 m transtibial-classified competition. Using planned comparisons (P < 0.05), limb-type and curve-side interactions showed shortest support time and lowest hip abduction displacement by outside-NONPROS-L; shortest step length and longest time to peak knee flexion by the inside-PROS-L. For limb-type, greater maximum knee flexion angle and lower hip extension angles and displacement during support and toe clearance of PROS-Ls occurred. For curve-side, higher hip abduction angles during non-support were displayed by inside-limbs. Therefore, practitioners should consider that, for curve running, these kinematics are affected mostly by PROS-L limitations, with no clear advantage of having the PROS-L on either side of the curve. 

Place, publisher, year, edition, pages
Taylor & Francis, 2018
Keywords
below-knee amputation, biomechanics, prostheses, running
National Category
Orthopaedics
Identifiers
urn:nbn:se:hj:diva-35349 (URN)10.1080/02640414.2017.1303186 (DOI)000418705200008 ()28322115 (PubMedID)2-s2.0-85015721055 (Scopus ID)HHJÖvrigtIS (Local ID)HHJÖvrigtIS (Archive number)HHJÖvrigtIS (OAI)
Available from: 2017-04-11 Created: 2017-04-11 Last updated: 2019-02-18Bibliographically approved
Rusaw, D., Hagberg, K., Nolan, L. & Ramstrand, N. (2013). Bilateral electromyogram response latency following platform perturbation in unilateral transtibial prosthesis users: Influence of weight distribution and limb position. Journal of rehabilitation research and development, 50(4), 531-544
Open this publication in new window or tab >>Bilateral electromyogram response latency following platform perturbation in unilateral transtibial prosthesis users: Influence of weight distribution and limb position
2013 (English)In: Journal of rehabilitation research and development, ISSN 0748-7711, E-ISSN 1938-1352, Vol. 50, no 4, p. 531-544Article in journal (Refereed) Published
Abstract [en]

Appropriate muscular response following an external perturbation is essential inpreventing falls. Transtibial prosthesis users lack a foot-ankle complex and associatedsensorimotor structures on the side with a prosthesis. Its effect on rapid responses ofthe lower-extremity to external surface perturbations is unknown. The aim of thepresent study was to compare electromyographic (EMG) response latencies of otherwisehealthy unilateral transtibial prosthesis users (n=23, mean age 48 years [standarddeviation 14]) and a matched control group (n=23, mean age 48 years [standard deviation13]) following sudden support surface rotations in the pitch plane (toes-up and toesdown).Perturbations were elicited in various weight-bearing and limb-perturbedconditions. The results indicated that transtibial prosthesis users have delayed responsesof multiple muscles of the lower-extremity following perturbation, both in the intact limband the residual limb. Weight-bearing had no influence on the response latency in theresidual limb, but did on the intact limb. Which limb received the perturbation wasfound to influence the muscular response, with the intact limb showing a significantlydelayed response when the perturbation was received only on the side with a prosthesis.These delayed responses may represent an increased risk of falling for individuals thatuse a transtibial prosthesis.

Keywords
Balance, Amputation, Prosthesis, Electromyography (EMG), Postural Response, Transtibial, Perturbation
National Category
Orthopaedics
Identifiers
urn:nbn:se:hj:diva-20927 (URN)10.1682/JRRD.2012.01.0017 (DOI)000321539600011 ()23934873 (PubMedID)2-s2.0-84880942388 (Scopus ID)
Funder
StandUp
Available from: 2012-11-01 Created: 2012-01-31 Last updated: 2018-08-28Bibliographically approved
Nolan, L. (2012). A TRAINING PROGRAMME TO IMPROVE HIP STRENGTH IN PERSONS WITH LOWER LIMB AMPUTATION. Journal of Rehabilitation Medicine, 44(3), 241-248
Open this publication in new window or tab >>A TRAINING PROGRAMME TO IMPROVE HIP STRENGTH IN PERSONS WITH LOWER LIMB AMPUTATION
2012 (English)In: Journal of Rehabilitation Medicine, ISSN 1650-1977, E-ISSN 1651-2081, Vol. 44, no 3, p. 241-248Article in journal (Refereed) Published
Abstract [en]

Objective: To investigate the effect of a 10-week training programme on persons with a lower limb amputation and to determine if this training is sufficient to enable running. Subjects: Seven transtibial, 8 transfemoral and 1 bilateral amputee (all resulting from trauma, tumour or congenital) were randomly assigned to a training (n = 8) or control group (n = 8). Methods: Isokinetic hip flexor and extensor strength at 60 and 120 degrees/s and oxygen consumption while walking at 1.0 m/s were tested pre- and post- a 10-week period. The training group followed a twice weekly hip strengthening programme, while the control group continued with their usual activities. Running ability was determined pretesting, and attempted after post-testing for the training group only. Results: The training group increased hip strength and decreased oxygen consumption. Six amputees who were previously unable to run were able to after training. The control group decreased intact limb hip extensor strength. Conclusion: The training programme is sufficient to improve hip strength and enable running in persons with a lower limb amputation. As hip strength was reduced in those not following the training programme, it is recommended that strength training be undertaken regularly in order to avoid losing limb strength following amputation.

Keywords
amputee, muscle strength, hip, running, training
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:hj:diva-22028 (URN)10.2340/16501977-0921 (DOI)000305492600009 ()
Available from: 2013-09-24 Created: 2013-09-24 Last updated: 2017-12-06Bibliographically approved
Rusaw, D., Hagberg, K., Nolan, L. & Ramstrand, N. (2012). Can vibratory feedback be used to improve postural stability in persons with transtibial limb loss?. Journal of rehabilitation research and development, 49(8), 1239-1254
Open this publication in new window or tab >>Can vibratory feedback be used to improve postural stability in persons with transtibial limb loss?
2012 (English)In: Journal of rehabilitation research and development, ISSN 0748-7711, E-ISSN 1938-1352, Vol. 49, no 8, p. 1239-1254Article in journal (Refereed) Published
Abstract [en]

The use of vibration as a feedback modality to convey motion of the body has been shown to improve measures of postural stability in some groups of patients. Because individuals using transtibial prostheses lack sensation distal to the amputation, vibratory feedback could possibly be used to improve their postural stability. The current investigation provided transtibial prosthesis users (n = 24, mean age 48 yr) with vibratory feedback proportional to the signal received from force transducers located under the prosthetic foot. Postural stability was evaluated by measuring center of pressure (CoP) movement, limits of stability, and rhythmic weight shift while participants stood on a force platform capable of rotations in the pitch plane (toes up/toes down). The results showed that the vibratory feedback increased the mediolateral displacement amplitude of CoP in standing balance and reduced the response time to rapid voluntary movements of the center of gravity. The results suggest that the use of vibratory feedback in an experimental setting leads to improvements in fast open-loop mechanisms of postural control in transtibial prosthesis users.

Keywords
amputation, balance, center of pressure, feedback, limits of stability, postural stability, prosthesis, rhythmic weight shift, transtibial, vibration
National Category
Orthopaedics
Identifiers
urn:nbn:se:hj:diva-17552 (URN)10.1682/JRRD.2011.05.0088 (DOI)000319303200011 ()23341316 (PubMedID)2-s2.0-84874340664 (Scopus ID)
Available from: 2012-11-01 Created: 2012-01-31 Last updated: 2018-08-28Bibliographically approved
Nolan, L., Patritti, B. L. & Simpson, K. J. (2012). Effect of take-off from prosthetic versus intact limb on transtibial amputee long jump technique. Prosthetics and orthotics international, 36(3), 297-305
Open this publication in new window or tab >>Effect of take-off from prosthetic versus intact limb on transtibial amputee long jump technique
2012 (English)In: Prosthetics and orthotics international, ISSN 0309-3646, E-ISSN 1746-1553, Vol. 36, no 3, p. 297-305Article in journal (Refereed) Published
Abstract [en]

Background: Increasing numbers of long jumpers with lower limb amputations choose to take off from their prosthetic limb. It is not yet known what difference in technique, if any, this requires, or which is more advantageous. Objectives: To investigate kinematic differences in long jump technique in athletes with a unilateral transtibial ampution (TT) who take off from their prosthetic limb versus those who take off from their intact limb. Study Design: Naturalistic, field-based, observational; independent group, nonparametric comparison. Methods: Two-dimensional sagittal plane kinematic analysis was performed on all athletes competing in the men's Paralympic TT long jump finals. Five athletes took off from their prosthetic limb (TOprosth) and five from their intact limb (TOintact). Results: No differences were seen between the two groups in terms of jump distance, approach speed or vertical velocity at touch down. While in contact with the take-off board, the two groups gained a similar amount of vertical velocity. However, the TOprosth group appeared to conserve horizontal velocity by using the prosthesis as a 'springboard', minimizing the large hip and knee range of motion displayed by the TOintact group and athletes in previous studies. Conclusions: While differences in technique were observed, no difference was found for jump distance.

Keywords
Disability, performance, technique, track and field, long jump
National Category
Orthopaedics
Identifiers
urn:nbn:se:hj:diva-22020 (URN)10.1177/0309364612448877 (DOI)000314244900006 ()HHJövrigtIS (Local ID)HHJövrigtIS (Archive number)HHJövrigtIS (OAI)
Available from: 2013-09-24 Created: 2013-09-24 Last updated: 2018-01-11Bibliographically approved
Nolan, L. (2008). Carbon fibre prostheses and running in amputees: A review. Foot and Ankle Surgery, 14(3), 125-129
Open this publication in new window or tab >>Carbon fibre prostheses and running in amputees: A review
2008 (English)In: Foot and Ankle Surgery, ISSN 1268-7731, E-ISSN 1460-9584, Vol. 14, no 3, p. 125-129Article in journal (Refereed) Published
Identifiers
urn:nbn:se:hj:diva-6718 (URN)
Available from: 2008-11-06 Created: 2008-11-06 Last updated: 2017-12-14Bibliographically approved
Jeleń, P., Wit, A., Dudziński, K. & Nolan, L. (2008). Expressing gait-line symmetry in able-bodied gait. Dynamic Medicine, 7(1), 17
Open this publication in new window or tab >>Expressing gait-line symmetry in able-bodied gait
2008 (English)In: Dynamic Medicine, ISSN 1476-5918, Vol. 7, no 1, p. 17-Article in journal (Refereed) Published
Abstract [en]

ABSTRACT: BACKGROUND: Gait-lines, or the co-ordinates of the progression of the point of application of the vertical ground reaction force, are a commonly reported parameter in most in-sole measuring systems. However, little is known about what is considered a "normal" or "abnormal" gait-line pattern or level of asymmetry. Furthermore, no reference databases on healthy young populations are available for this parameter. Thus the aim of this study is to provide such reference data in order to allow this tool to be better used in gait analysis. METHODS: Vertical ground reaction force data during several continuous gait cycles were collected using a Computer Dyno Graphy in-sole system(R) for 77 healthy young able-bodied subjects. A curve (termed gait-line) was obtained from the co-ordinates of the progression of the point of application of the force. An Asymmetry Coefficient Curve (AsC) was calculated between the mean gait-lines for the left and right foot for each subject. AsC limits of +/- 1.96 and 3 standard deviations (SD) from the mean were then calculated. Gait-line data from 5 individual subjects displaying pathological gait due to disorders relating to the discopathy of the lumbar spine (three with considerable plantarflexor weakness, two with considerable dorsiflexor weakness) were compared to the AsC results from the able-bodied group. RESULTS: The +/- 1.96 SD limit suggested that non-pathological gait falls within 12-16% asymmetry for gait-lines. Those exhibiting pathological gait fell outside both the +/- 1.96 and +/- 3SD limits at several points during stance. The subjects exhibiting considerable plantarflexor weakness all fell outside the +/- 1.96SD limit from 30-50% of foot length to toe-off while those exhibiting considerable dorsiflexor weakness fell outside the +/- 1.96SD limit between initial contact to 25-40% of foot length, and then surpassed the +/- 3SD limit after 55-80% of foot length. CONCLUSION: This analysis of gait-line asymmetry provides a reference database for young, healthy able-bodied subject populations for both further research and clinical gait analysis. This information is used to suggest non-pathological gait-line asymmetry pattern limits, and limits where detailed case analysis is warranted.

Identifiers
urn:nbn:se:hj:diva-9246 (URN)10.1186/1476-5918-7-17 (DOI)19099568 (PubMedID)
Available from: 2009-06-01 Created: 2009-06-01 Last updated: 2017-12-13Bibliographically approved
Nolan, L. & Patritti, B. (2008). The take-off phase in transtibial amputee high jump. Prosthetics and orthotics international, 32(2), 160-171
Open this publication in new window or tab >>The take-off phase in transtibial amputee high jump
2008 (English)In: Prosthetics and orthotics international, ISSN 0309-3646, E-ISSN 1746-1553, Vol. 32, no 2, p. 160-171Article in journal (Refereed) Published
Identifiers
urn:nbn:se:hj:diva-6717 (URN)
Available from: 2008-11-06 Created: 2008-11-06 Last updated: 2017-12-14Bibliographically approved
Nolan, L. & Halvorsen, K. (2007). Ground reaction forces during long jump take-off for transtibial amputees. In: Proceedings of The XXV International Symposium on Biomechanics in Sports. August 32-27, Ouro Preto, Brazil: .
Open this publication in new window or tab >>Ground reaction forces during long jump take-off for transtibial amputees
2007 (English)In: Proceedings of The XXV International Symposium on Biomechanics in Sports. August 32-27, Ouro Preto, Brazil, 2007Conference paper, Published paper (Refereed)
Identifiers
urn:nbn:se:hj:diva-5274 (URN)
Available from: 2008-01-15 Created: 2008-01-15 Last updated: 2009-06-01Bibliographically approved
Nolan, L. (2007). Klara, färdiga ... spring!: En bok om att gå, motionera och idrotta med benprotes (ed.). Stockholm: SISU
Open this publication in new window or tab >>Klara, färdiga ... spring!: En bok om att gå, motionera och idrotta med benprotes
2007 (Swedish)Book (Other (popular science, discussion, etc.))
Place, publisher, year, edition, pages
Stockholm: SISU, 2007. p. 48
Identifiers
urn:nbn:se:hj:diva-5273 (URN)91-85433-22-5 (ISBN)
Available from: 2008-01-14 Created: 2008-01-14 Last updated: 2009-06-01Bibliographically approved
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