Strength training makes runners more durable.
Researchers at Loughborough University conducted a 10-week randomized controlled trial with 28 well-trained male runners (average VO₂max of 58.6 ml/kg/min and a 10K time of ~39 minutes).
The runners were split into two groups: one who continued their usual training (endurance-only) and another who added twice-weekly strength training to their endurance training (endurance strength)—performing squats, leg presses, calf raises, and plyometrics like drop jumps and bounds thrice weekly in addition to their standard training.
- Runners who added strength training maintained better running economy, which improved by 2.1% 90 minutes into an endurance test, whereas it worsened by 0.6% in the endurance-only group.
- A smaller increase in blood lactate in the strength-trained runners during the test also suggested better metabolic efficiency during prolonged running.
This translated to better durability. High-intensity performance after a 90-minute run improved significantly: Time to exhaustion increased by 35% in the endurance strength group but declined by 8% in the endurance-only group.
The runners who strength trained also reported lower perceived effort during prolonged running, which likely contributed to their ability to sustain a hard effort at the end of the test.
DOI: 10.1249/MSS.0000000000003685