Abstract
Purpose
To investigate the effects of combined strength and speed endurance (SE) training along with a reduced training volume on performance, running economy and muscular adaptations in endurance-trained runners.
Methods
Sixteen male endurance runners (VO2-max: ~60 ml kg−1 min−1) were randomly assigned to either a combined strength and SE training (CSS; n = 9) or a control (CON; n = 7) group. For 8 weeks, CSS replaced their normal moderate-intensity training (~63 km week−1) with SE (2 × week−1) and strength training (2 × week−1) as well as aerobic high (1 × week−1) and moderate (1 × week−1) intensity training with a reduction in total volume of ~58 %, whereas CON continued their training (~45 km week−1).
Results
In CSS, 400-m and Yo-Yo intermittent recovery test performance was improved by 5 % (P < 0.01) and 19 % (P < 0.001), respectively, during the intervention period. Maximal aerobic speed was 0.6 km h−1 higher (P < 0.05), and maximal activity of lactate dehydrogenase subunits 1 and 2 was 17 % (P < 0.05) higher after compared to before the intervention period. Time to exhaustion and peak blood lactate during an incremental treadmill test was 9 % (P < 0.05) and 32 % (P < 0.01), respectively, higher and expression of Na+–K+ pump β1 subunit was 15 % higher (P < 0.05) after compared to before the intervention period. 10-K performance, maximum oxygen uptake and running economy were unchanged. In CON, no changes were observed.
Conclusions
Adding strength and speed endurance training, along with a reduced training volume, can improve short-term exercise capacity and induce muscular adaptations related to anaerobic capacity in endurance-trained runners.
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Abbreviations
- AH:
-
Aerobic high-intensity training
- AM:
-
Aerobic moderate-intensity training
- CON:
-
Control group
- COX:
-
Cytochrome c oxidase
- CS:
-
Citrate synthase
- CSS:
-
Combined strength and speed endurance
- HAD:
-
Hydroxyaxyl-CoA dehydrogenase
- HRmax :
-
Maximal heart rate
- LDH:
-
Lactate dehydrogenase
- MAS:
-
Maximal aerobic speed
- MCT:
-
Monocarboxylate transporter
- Na+–K+ pump:
-
Sodium potassium pump
- NHE:
-
Na+/H+-exchanger
- PFK:
-
Phosphofructokinase
- RM:
-
Repetition maximum
- SE:
-
Speed endurance
- VO2-max:
-
Maximal oxygen uptake
- Yo-Yo IR:
-
Yo-Yo intermittent recovery test
- %VO2-max:
-
Relative maximal oxygen uptake
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Acknowledgments
We thank J. Schmidt and L. Nybo for excellent medical assistance as well as J.J. Nielsen and M. Thomassen for excellent technical assistance. This work was supported by Team Denmark.
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Communicated by Michael Lindinger.
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Vorup, J., Tybirk, J., Gunnarsson, T.P. et al. Effect of speed endurance and strength training on performance, running economy and muscular adaptations in endurance-trained runners. Eur J Appl Physiol 116, 1331–1341 (2016). https://doi.org/10.1007/s00421-016-3356-4
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DOI: https://doi.org/10.1007/s00421-016-3356-4