Stretch Shorten Cycle

On Stretch Shorten Cycle

“Understanding Stretch Shortening Cycle Ability in Youth”

– Sofyan Sahrom, Nigel Harris and John Cronin

Extensive research has investigated stretch-shorten cycle (SSC) performance in adults, however to date, only a few studies have investigated SSC ability in youths. Youths undergoing puberty experience many physiological changes, which include changes to neuromuscular and musculotendinous systems. To understand the possible differences in SSC ability, this review will: 1) briefly discuss maturation (biological vs. chronological), 2) discuss the contribution of the active and passive components to SSC ability and how these components may change with maturation; and, 3) review literature that has quantified SSC ability across maturation via comparison of countermovement and squat jump performance.

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“Slow Stretch-Shorten Cycle Characteristics: Gender and Maturation Differences in Singaporean Youths”

S- ofyan Sahrom, Nigel Harris and John Cronin

Objective: This cross-sectional study aims to compare the differences between the countermovement jump (CMJ) and concentric only squat jump (SJ) (no arm swing) and examine the differences and slow SSC ability of youths at different stages of
maturation (pre-pubescent, pubescent and post pubescent).

Conclusion: It would seem that concentric force/power capabilities are more likely to be influenced by maturation than eccentric force and power. Furthermore it appears that the eccentric capability and thus SSC augmentation is optimal around pubescence and with maturity this ability diminishes to some extent.

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“Understanding stretch shorten cycle capability in adolescence across the different maturational stages”

– Sofyan Sahrom