Effect of speed endurance and strength training on performance, running economy and muscular adaptations in endurance-trained runners
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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.
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).
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.
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.
KeywordsPulmonary oxygen uptake High-intensity training Resistance training Muscle ion transport proteins
Aerobic high-intensity training
Aerobic moderate-intensity training
Cytochrome c oxidase
Combined strength and speed endurance
Maximal heart rate
Maximal aerobic speed
- Na+–K+ pump
Sodium potassium pump
Maximal oxygen uptake
- Yo-Yo IR
Yo-Yo intermittent recovery test
Relative maximal oxygen uptake
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.
Compliance with ethical standard
Conflict of interest
The authors declare that they have no conflict of interest.
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