New Delhi, June 16 -- While treadmills, rowing machines and ellipticals will always be popular, it is the cycle that can be the most useful of them all. However, it depends on your primary fitness activity. If you're into running, the treadmill will always be your most important gym partner. But if you're working on fitness in general, and play multiple sports, or climb and hike for adventure, then making the exercise bike a part of your routine will be a good decision.

The first reason is that it gives you a refreshing challenge when it comes to cardio activity. Switching between multiple forms of cardio activity makes working out fun. There are two ways to do this: One is to use a couple of these machines on the same workout day, or us...