ldesfor1@ithaca

Yes, at 6'1" 158, you do not need to lose weight. Do you know what your body fat composition is? If it is below 11 or so percent and you still have a pot belly, then you are unlucky, my friend. If you are 14% bodyfat or more then you really should begin increasing overall muscle mass through 3 times a week resistance training.

A caveat: if you have a bulge in the stomach, but little fat there, then it is possible that you have very weak hams and ab muscles and tight quads and low back. Tight quads on a cyclist!?!? Strengthening the abs and hammies and stretching all formentioned muscles would help to correct this possible pelvic tilt which results in a poochie looking stomach. if this makes sense, i can elaborate

ldesfor1@ithaca

Also, i recomend an exercise called a Plank for overall core strength. this is a yoga move and if done correctly is great at strengthening the entire Rectus Abdominus. Do a google search of "yoga plank" and check images. really focus on flexing your abdominals durring this pose. this can be done by imagining you are trying to touch the bottom of your ribcage to the top of your hips. this among other static core strenght exercises are valuable.
Crunches are fine, but we as cyclists are holding our upper bodies quite still, this is why training the abs in a "still" or static position may be valuable.

balto charlie

here's a link, called stability balls
https://tinyurl.com/32la66

Bob_Chase

The ONLY way to burn fat is through a sensible diet and cardio. That being said you can draw attention away from your midsection by working out your upper body to create that "v-shape". The best way to do this is through pull-ups. If you're struggling at first, a few weeks of military presses, bent-over rows, and good ol' push-ups will help.

Bob_Chase

I don't put much stock in a lot of the gimmicky gadgets you find on the market. Best course of action--keep it old-skool.

Aside from the obvious--losing weight--get yourself a pull-up bar and do hanging knee raises.

Hang from the bar with a wider than shoulder width grip. Slowly raise your knees to your chest. At the top of the motion focus on curling your hips up toward your chest. Once you build up your base strength you can add some difficulty by turning your hips and knees to the side and performing the motion above. This will place more emphasis on your obliques (the sides of your abs).

As someone else mentioned you should also focus on working your lower back which will balance your core. As with everything it's about balance and symmetry.

Another helpful gadget/exercise: jump rope.