TY - JOUR

T1 - Explosive resistance training increases rate of force development in ankle dorsiflexors and gait function in adults with cerebral palsy

AU - Kirk, Henrik

AU - Geertsen, Svend Sparre

AU - Lorentzen, Jakob

AU - Krarup, Kasper Bygum

AU - Bandholm, Thomas Quaade

AU - Nielsen, Jens Bo

N1 - CURIS 2016 NEXS 264

PY - 2016

Y1 - 2016

N2 - Alterations in passive elastic properties of muscles and reduced ability to quickly generate muscle force contribute to impaired gait function in adults with cerebral palsy (CP). Here, we investigated if 12 weeks of progressive and explosive resistance training (PRT) increases rate of force development of ankle dorsiflexors (RFDdf), improves gait function and affects passive ankle joint stiffness in adults with CP.Thirty-five adults (age 36.5; range: 18-59 years) with CP were non-randomly assigned to a PRT or non-training control (CON) group in this explorative trial. The PRT group trained ankle dorsiflexion, plantarflexion, leg press, hamstring curls, abdominal curls and back extension 3 days/week for 12 weeks, with 3 sets per exercise and progressing during the training period from 12-6 RM. RFDdf, 3-D gait analysis, functional performance and ankle joint passive- and reflex-mediated muscle stiffness were evaluated pre and post.RFDdf increased significantly following PRT compared to CON. PRT also caused a significant increase in toe lift late in swing and a significantly more dorsiflexed ankle joint at ground contact and during stance. The increased toe lift amplitude was correlated to the increased RFDdf (r=0.73). No other between-group differences were observed.These findings suggest that explosive PRT may increase RFDdf and facilitate larger range of movement in the ankle joint during gait. Explosive PRT should be tested in clinical practice as part of a long-term training program for adults with CP.

AB - Alterations in passive elastic properties of muscles and reduced ability to quickly generate muscle force contribute to impaired gait function in adults with cerebral palsy (CP). Here, we investigated if 12 weeks of progressive and explosive resistance training (PRT) increases rate of force development of ankle dorsiflexors (RFDdf), improves gait function and affects passive ankle joint stiffness in adults with CP.Thirty-five adults (age 36.5; range: 18-59 years) with CP were non-randomly assigned to a PRT or non-training control (CON) group in this explorative trial. The PRT group trained ankle dorsiflexion, plantarflexion, leg press, hamstring curls, abdominal curls and back extension 3 days/week for 12 weeks, with 3 sets per exercise and progressing during the training period from 12-6 RM. RFDdf, 3-D gait analysis, functional performance and ankle joint passive- and reflex-mediated muscle stiffness were evaluated pre and post.RFDdf increased significantly following PRT compared to CON. PRT also caused a significant increase in toe lift late in swing and a significantly more dorsiflexed ankle joint at ground contact and during stance. The increased toe lift amplitude was correlated to the increased RFDdf (r=0.73). No other between-group differences were observed.These findings suggest that explosive PRT may increase RFDdf and facilitate larger range of movement in the ankle joint during gait. Explosive PRT should be tested in clinical practice as part of a long-term training program for adults with CP.

U2 - 10.1519/JSC.0000000000001376

DO - 10.1519/JSC.0000000000001376

M3 - Journal article

C2 - 26890969

VL - 30

SP - 2749

EP - 2760

JO - Journal of Strength and Conditioning Research

JF - Journal of Strength and Conditioning Research

SN - 1064-8011

IS - 10

ER -