Abstract
Purpose
To investigate the effect of repetition tempo on cardiovascular and metabolic stress when time under tension (TUT) and effort are matched during sessions of lower body resistance training (RT).
Methods
In a repeated-measures, cross-over design, 11 recreationally trained females (n = 5) and males (n = 6) performed 5 sets of belt squats under the following conditions: slow-repetition tempo (SLOW; 10 reps with 4-s eccentric and 2-s concentric) and traditional-repetition tempo (TRAD; 20 reps with 2-s eccentric and 1-s concentric). TUT (60 s) was matched between conditions and external load was adjusted so that lifters were close to concentric muscular failure at the end of each set. External load, total volume load (TVL), impulse (IMP), blood lactate, ratings of perceived exertion (RPE), HR, and muscle oxygenation were measured.
Results
Data indicated that TVL (p < 0.001), blood lactate (p = 0.017), RPE (p = 0.015), and HR (p < 0.001) were significantly greater during TRAD while external load (p = 0.030) and IMP (p = 0.002) were significantly greater during SLOW. Whether it was expressed as minimal values or change scores, muscle oxygenation was not different between protocols.
Conclusion
When TUT is matched, TVL, cardiovascular stress, metabolic stress, and perceived exertion are greater when faster repetition tempos are used. In contrast, IMP and external load are greater when slower repetition tempos are used.
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Availability of data and materials
The data used to support the findings of this study are available from the corresponding author upon request.
Code availability
Not applicable.
Abbreviations
- ANOVA:
-
Analysis of variance
- BF%:
-
Body fat percentage
- bpm:
-
Beats per minute
- cm:
-
Centimeter
- HR:
-
Heart rate
- HSD:
-
Honestly significant difference
- ICC:
-
Intraclass correlation coefficient
- kg:
-
Kilogram
- IMP:
-
Impulse
- NIRS:
-
Near-infrared spectroscopy
- OMNI:
-
Omnibus
- RIR:
-
Repetitions in reserve
- RM:
-
Repetition maximum
- RPE:
-
Ratings of perceived exertion
- RT:
-
Resistance training
- SD:
-
Standard deviation
- SLOW:
-
Slow repetition tempo
- TRAD:
-
Traditional-repetition tempo
- TSI:
-
Tissue saturation index
- TUT:
-
Time under tension
- TVL:
-
Total volume load
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Acknowledgements
The authors thank the University of New Mexico Exercise Physiology lab for use of equipment and would like to extend our gratitude to the subjects who volunteered for this research.
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This study was supported by a grant from the College of Education at the University of New Mexico.
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CM, FA, FM, GB, JB, JD, LK, RR, and ZM contributed to the research design and study approval. CM, FA, GB, JD, RR, and ZM contributed to the data collection. JB and ZM contributed to the statistical analysis. CM, FA, FM, GB, JB, JD, LK, RR, and ZM contributed to the manuscript writing.
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This study was approved by the University’s Institutional Review Board for human subject research in accordance with the Declaration of Helsinki.
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Communicated by Philip D. Chilibeck.
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Mang, Z.A., Realzola, R.A., Ducharme, J. et al. The effect of repetition tempo on cardiovascular and metabolic stress when time under tension is matched during lower body exercise. Eur J Appl Physiol 122, 1485–1495 (2022). https://doi.org/10.1007/s00421-022-04941-3
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DOI: https://doi.org/10.1007/s00421-022-04941-3