Lower-effort cycling improved strength in sedentary adults
Leg strength rose 14% with muscle-lengthening cycling intervals versus 24% with conventional intervals over 12 weeks; only conventional intervals improved aerobic fitness.
Edited by Boris Djordjevic · AgingResearch.News
A trial compared three cycling programs in 43 sedentary adults aged 61. They trained twice weekly for 12 weeks: 15 did muscle-lengthening intervals, 15 did continuous muscle-lengthening exercise and 13 did conventional intervals. Muscle-lengthening exercise loads muscles as they lengthen rather than shorten. Training intensity ranged from 120–135% of maximal aerobic power, a measure of cycling performance, for muscle-lengthening intervals and 80–90% for the other programs.
Both muscle-lengthening programs involved lower average heart rates and perceived effort than conventional intervals, without the onset of muscle soreness. Maximum thigh-muscle strength rose 14%, 17% and 24%, respectively. Walking and repeated chair-standing performance also improved in all groups. Only conventional intervals improved aerobic fitness, the capacity to take in and use oxygen: maximum oxygen consumption rose 14%, versus a 1% rise with muscle-lengthening intervals and a 1% fall with continuous exercise.
Why it matters
Older adults are prone to deconditioning. The trial addressed how to balance exercise demands with gains in muscle function and mobility, which matter for maintaining physical abilities with age.
Caveats
The abstract does not report random assignment or an inactive control group. The findings in sedentary adults do not establish the authors’ proposed benefits for patients unable to tolerate conventional exercise intensities.
The paper
Interval eccentric cycling : a promising training modality for sedentary people
University of Liège
European Journal of Applied Physiology, Jul 15, 2026