Thus, the emphasis on the long slow run, which has fallen out of favor with many coaches and training systems who jumped on the «intensity» bandwagon a few years ago. (completehumanperformance.com)
Once you've logged a few continuous runs, try adding in bursts of speed — 20 to 30 seconds of faster running followed by at least a minute of slower running. (health.com)
The mice had a 30 % slower running time than usual and covered 50 % less distance. (sciencedaily.com)