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Daniel H. Serravite, Arlette Perry, Kevin A. Jacobs, Jose A. Adams, Kysha Harriell and Joseph F. Signorile

Purpose:

To examine the effects of whole-body periodic acceleration (pGz) on exercise-induced-muscle-damage (EIMD) -related symptoms induced by unaccustomed eccentric arm exercise.

Methods:

Seventeen active young men (23.4 ± 4.6 y) made 6 visits to the research facility over a 2-wk period. On day 1, subjects performed a 1-repetition-maximum (1RM) elbowflexion test and were randomly assigned to the pGz (n = 8) or control group (n = 9). Criterion measurements were taken on day 2, before and immediately after performance of the eccentric-exercise protocol (10 sets, 10 repetitions using 120% 1RM) and after the recovery period. During subsequent sessions (24, 48, 72, and 96 h) these data were collected before pGz or passive recovery. Measurements included isometric strength (maximal voluntary contraction [MVC]), blood markers (creatine kinase, myoglobin, IL-6, TNF-α, TBARS, PGF2α, protein carbonyls, uric acid, and nitrites), soreness, pain, circumference, and range of motion (ROM).

Results:

Significantly higher MVC values were seen for pGz throughout the recovery period. Within-group differences were seen in myoglobin, IL-6, IL-10, protein carbonyls, soreness, pain, circumference, and ROM showing small negative responses and rapid recovery for the pGz condition.

Conclusion:

Our results demonstrate that pGz can be an effective tool for the reduction of EIMD and may contribute to the training-adaptation cycle by speeding up the recovery of the body due to its performance-loss-lessening effect.

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Kathleen F. Janz and Fatima Baptista

, biochemical markers of bone turnover, and calcium homeostasis in eleven normal subjects . J Bone Miner Res . 1998 ; 13 : 1594 – 601 . PubMed doi:10.1359/jbmr.1998.13.10.1594 10.1359/jbmr.1998.13.10.1594

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Graeme L. Close, Craig Sale, Keith Baar and Stephane Bermon

( Barry et al., 2011 ), both of which have been shown to limit disturbances to calcium homeostasis and, potentially, the bone metabolic response to subsequent exercise. Athletes are generally advised to consume more protein than the recommended daily allowance of 0.8 g·kg BM −1 ·day −1 , with many

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George Wilson, Dan Martin, James P. Morton and Graeme L. Close

.C. , van Pelt , R.E. , Witten , M. , Wolfe , P. , & Kohrt , W.M. ( 2011 ). Acute calcium ingestion attenuates exercise-induced disruption of calcium homeostasis . Medicine & Science in Sports & Exercise, 43 ( 4 ), 617 – 623 . PubMed ID: 20798655 doi:10.1249/MSS.0b013e3181f79fa8 10.1249/MSS.0b

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Heather L. Colleran, Andrea Hiatt, Laurie Wideman and Cheryl A. Lovelady

active women: a longitudinal study . Bone Miner . 1991 ; 14 ( 2 ): 153 – 160 . PubMed ID: 1912763 doi:10.1016/0169-6009(91)90092-E 10.1016/0169-6009(91)90092-E 1912763 18. Kalkwarf HJ , Specker BL , Ho M . Effects of calcium supplementation on calcium homeostasis and bone turnover in

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Louise M. Burke, Graeme L. Close, Bronwen Lundy, Martin Mooses, James P. Morton and Adam S. Tenforde

, 95 ( 1 ), 59 – 66 . PubMed ID: 16441917 doi:10.1079/BJN20051608 10.1079/BJN20051608 Haakonssen , E.C. , Ross , M.L. , Knight , E.J. , Cato , L.E. , Nana , A. , Wluka , A.E. , … Burke , L.M. ( 2015 ). The effects of a calcium-rich pre-exercise meal on biomarkers of calcium homeostasis