A Comparison of Workload Quantification Methods in Relation to Physiological Responses to Resistance Exercise

• Autores: Kyle M. Genner, Matthew Weston
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 28, Nº. 9, 2014, págs. 2621-2627
• Idioma: inglés
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• Dialnet Métricas: 1 Cita
• Resumen

  • The purpose of this study was to (a) assess the usefulness of volume load (VL), session rate of perceived exertion (SRPE), RPE load (RPEL), and a modified RPEL (RPEL-2) to estimate internal load from resistance exercise (RE) and (b) further assess the interactions between SRPE, VL, and RE intensity. Twelve healthy men (25 ± 4 years) completed RE sessions at 55, 70, and 85 1 repetition maximum (1RM). Volume load, SRPE, RPEL, and RPEL-2 for each session were calculated, compared, and correlated with change values ([DELTA]) for blood lactate and salivary cortisol. There were substantial increases in all measures of training load with progressive decreases in %1RM. There were clear substantial increases in [DELTA] lactate and [DELTA] cortisol after RE at 55% 1RM when compared with 70 and 85%. Within-subject correlations with [DELTA] cortisol were small with SRPE (r = 0.25; 90% confidence limits; ±0.32), RPEL (r = 0.23; ±0.32), RPEL-2 (r = 0.19; ±0.32), and trivial for VL (r = 0.01; ±0.28). Correlations with [DELTA] lactate were moderate with VL (r = 0.42; ±0.29) and RPEL-2 (r = 0.38; ±0.29), and small with SRPE (r = 0.25; ±0.32) and RPEL (r = 0.25; ±0.32). Correlation between SRPE and VL was large (r = 0.55; ±0.25). Although [DELTA] lactate and [DELTA] cortisol did not follow the same trends as measures of workload, VL may be superior to estimate internal load from RE, particularly when measured through [DELTA] lactate. When viewing training load globally, RPEL-2 may offer the greatest advantage. Finally, our results suggest that SRPE seems to be more closely related to VL than %1RM.