Maximum aerobic power (VO2 max), maximum anaerobic power (AP max), submaximal exercise heart rate (HRsub), and performance times for distances of 15m, 600 m, 3.22 km, and 10 km were evaluated in 12 male runners prior to and after 7 weeks of a running programme at each individual's maximum steady-state (MSS) pace. MSS pace, a running speed at which blood lactate is believed to equal 2.2 mmol . l...

Physical activity is often considered to increase the risk of atrial fibrillation (AF), on the basis of anecdotal reports, case series, and retrospective studies evaluating vigorous exertion and endurance training in younger and middle-aged athletes; however, most AF cases do not occur in athletes but in the general population of older adults ( 65 years old), in whom 10-year risk of AF approach...