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Kinematics and neuromuscular recruitment during vertical treadmill exercise
Alastair R. Jordan,Andrew Barnes,David Claxton,Alison Purvis,Mary Fysh 한국운동재활학회 2017 JER Vol.13 No.3
The vertical treadmill (VertiRun) is an unresearched, partial weight-bear-ing exercise mode for lower limb rehabilitation. The user undertakes a “running-like” action whilst body weight is supported by a bench and the limb is drawn downwards against overhanging resistance cables on a vertically hung nonmotorised treadmill. This study sought to describe the kinematics and neuromuscular recruitment during VertiRun exercise in the supine, 40°, and 70° postures. Twenty-one healthy male partici-pants (age, 25±7 years; stature, 1.79±0.07 m; body mass, 77.7±8.8 kg) volunteered for sagittal plane kinematic analysis of the ankle, knee and hip and electromyography of lower limb musculature in all three pos-tures. Results indicated similar kinematic and neuromuscular profiles in the 40° and 70° postures which differed from the supine. Regardless of posture, a basic movement pattern was observed where the hamstrings and gastrocnemius muscles were active to extend the hip, flex the knee, plantarflex the ankle and draw the leg down the treadmill belt in the contact phase. The rectus femoris and tibialis anterior were active to flex the hip and knee, and dorsiflex the ankle to draw the leg upwards during the swing phase. The vasti muscles were not active during Ver-tiRun exercise. The VertiRun demonstrated similar kinematic and neuro-muscular patterns to overground gait, allows workload progression based on effort and posture changes, and is a low-impact exercise mode that could maintain physical fitness without loading injured tis-sues. This study suggests that the VertiRun could supplement rehabilita-tion programmes for lower-limb injuries.
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Alastair Ross Jordan,David Claxton,Alison Purvis,Andrew Barnes,Mary Fysh 한국운동재활학회 2018 JER Vol.14 No.1
The vertical treadmill (VertiRun) is an unresearched mode of exercise where users engage in a “running-like” action whilst body weight is supported by a recumbent bench and overhanging resistance cables are tethered to the user’s ankles. The purpose of this study was to de-termine the effects of training on a VertiRun and any cross-training ef-fect on running performance. Thirty active males (age, 22±4 years; stature, 1.79±0.08 m; body mass, 78.5±12.6 kg) volunteered for this study. Participants’ aerobic and anaerobic running performance were deter-mined by incremental maximum rate of oxygen consumption (VO2max) treadmill test and a maximum anaerobic running test (MART), respec-tively. Participants were matched and then randomly assigned to either a VertiRun group, 20-m shuttle sprint group or control group. The inter-vention consisted of 4–6, 30-sec all-out efforts with 4-min recovery be-tween bouts, 3 days a week for 6 weeks. The pre- and postintervention VO2max and MART were analysed using a mixed repeated measures analysis of variance. MART increased by 4.5% in the VertiRun group (P=0.006) and 4% in the sprint group (P<0.001). VO2max increased by 6.2% in the VertiRun group (P=0.009) and 5.5% in the sprint group (P=0.020). The MART and VO2max of the control group were unchanged (P=0.910 and P=0.915, respectively). These data suggest that the Ver-tiRun could be an effective cross-training mode for running and could supplement training programmes. Also, as VertiRun is a low-impact ex-ercise it might be useful in the physical preparation of athletes returning to sport following lower limb injury.
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