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Different Effects of Concentric and Eccentric Muscle Actions on Plasma Volume
The Journal of Strength and Conditioning Research: Vol. 17, No. 3, pp. 541–548.
Robert J. Durand, Robert R. Kraemer, Daniel B. Hollander, James L. Tryniecki, Melanie Wall, Lloyd Saxon, and Edward P. Hebert
Department of Kinesiology and Health Studies, Southeastern Louisiana University, Hammond, Louisiana 70402
ABSTRACT
The effects of concentric (CON) and eccentric (ECC) contractions on Δ plasma volume (PV), heart rate (HR), and lactate in responses to protocols in different body positions were investigated. CON or ECC contractions were performed in either a single-exercise (6 sets of 12 repetitions of leg extensions completed at 80% of 12 repetition maximum [12RM] with 3-minute rest periods) or multiexercise (4 sets of 10 repetitions for both CON and ECC trials of bench press, leg extension, military press, and leg curl at 80% of 10RM with 90-second rest periods) protocols. HR and lactate increased significantly for both protocols from pre- to postexercise for CON but not ECC trials. ΔPV was greater following both CON single-exercise (−11.48 ± 1.38%) and multiexercise (−4.64 ± 0.33%) trials vs. ECC single-exercise (−1.62 ± 1.69%) and multiexercise (−1.26 ± 1.20) trials. Data demonstrate ECC exercise in response to single and multiexercise protocols at the same absolute workload as CON exercise produces less cardiovascular stress.
Reference Data
urand, R.J., R.R. Kraemer, D.B. Hollander, J.L. Tryniecki, M. Wall, L. Saxon, and E.P. Hebert. Different effects of concentric and eccentric muscle actions on plasma volume.
The Journal of Strength and Conditioning Research: Vol. 17, No. 3, pp. 541–548.
Robert J. Durand, Robert R. Kraemer, Daniel B. Hollander, James L. Tryniecki, Melanie Wall, Lloyd Saxon, and Edward P. Hebert
Department of Kinesiology and Health Studies, Southeastern Louisiana University, Hammond, Louisiana 70402
ABSTRACT
The effects of concentric (CON) and eccentric (ECC) contractions on Δ plasma volume (PV), heart rate (HR), and lactate in responses to protocols in different body positions were investigated. CON or ECC contractions were performed in either a single-exercise (6 sets of 12 repetitions of leg extensions completed at 80% of 12 repetition maximum [12RM] with 3-minute rest periods) or multiexercise (4 sets of 10 repetitions for both CON and ECC trials of bench press, leg extension, military press, and leg curl at 80% of 10RM with 90-second rest periods) protocols. HR and lactate increased significantly for both protocols from pre- to postexercise for CON but not ECC trials. ΔPV was greater following both CON single-exercise (−11.48 ± 1.38%) and multiexercise (−4.64 ± 0.33%) trials vs. ECC single-exercise (−1.62 ± 1.69%) and multiexercise (−1.26 ± 1.20) trials. Data demonstrate ECC exercise in response to single and multiexercise protocols at the same absolute workload as CON exercise produces less cardiovascular stress.
Reference Data
urand, R.J., R.R. Kraemer, D.B. Hollander, J.L. Tryniecki, M. Wall, L. Saxon, and E.P. Hebert. Different effects of concentric and eccentric muscle actions on plasma volume.