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Resistance exercise heart rate recovery in youth with Prader‐Willi syndrome, nonsyndromal obese children and lean controls (881.13)
Author(s) -
Castner Diobel,
Pham Hoang,
Judelson Daniel,
Rubin Daniela
Publication year - 2014
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.28.1_supplement.881.13
Subject(s) - medicine , lean body mass , heart rate , cardiology , endocrinology , physical therapy , blood pressure , body weight
Prader‐Willi Syndrome (PWS) is a genetic disorder characterized by excess adiposity, low lean mass and hypotonia. Heart rate recovery (HRR), a determinant of all‐cause mortality, is slower in PWS in response to endurance exercise. This study examined how adiposity and PWS influence resistance exercise HRR. Eight PWS youth (age=11.5±3.5 y, body fat=44.1±3.9 %) and 16 nonsyndromal obese (OB: age=9.5±1.2 y, body fat=39.5±4.5 %) and 12 lean (LN: age=9.1±1.2 y, body fat=17.8±5.1 %) children completed six sets of a bench‐stepping protocol. Each set consisted of 10 steps per leg onto an adjustable platform (~20% of stature) while donning a weighted vest (~50% of lean body mass), followed by one minute of rest. HRR value (HRRV) was calculated as the difference between test termination HR and HR one minute after exercise. One‐way ANOVA showed PWS had a significantly lower HRRV (44±13 beats) compared to OB (63±20 beats; p=0.035) and LN (63±13 beats; p=0.044). Similar to previous research in submaximal endurance exercise, nonsyndromal OB and LN children recovered faster than PWS, suggesting adiposity alone did not affect resistance exercise HRR. The lower HRRV in PWS may be attributed to poor cardiovascular fitness and/or autonomic nervous system dysfunction inherent to the syndrome. Further, resistance exercise HRRVs appeared comparable to previously studied endurance exercise HRRVs in youth. Grant Funding Source : Supported by USAMRAA Award W81XWH‐08‐1‐0025