I am not a watch
link expert, but I am sort of a fitness expert, if sheer hours of participation are enough to qualify. I’ve done 10 marathons, three half-Ironman triathlons, and one totally insane
link full Ironman (a 2.4 mile swim, followed by a 112-mile bike ride, and then a 26.2-mile run, all of which took me 13 hours and
link 45 minutes through the Adirondacks and made me grateful to sit down).