Originally Posted by
ZiR RED
You can improvise. I use my car and an empty parking lot. I put the car in neutral and push it from behind. Speed never gets past a few mph, so there is no risk of it running off (so long as its a level lot) and I usually push for about 20-30m at a time.
Studies have been done, and found a higher energy expenditure and greater recruitment of muscles running on solid ground vs. on the treadmill. As for the elyptical, probably the least efficient piece of equipment and perhaps the most destructive. Recruitment of the adductors, abductors, knee extensors and flexors, as well as the calves are minimized. Therefore, at a given heart rate, youre actually burning less calories.
A rowing erg is a good low-impact piece of cardio equipment, that can be set for high intensity intervals.
Br