When you lose weight how do you stop your skin from sagging and can sit-ups and ab crunches help?
Unforntunately, no. Skin elasticity is a genetic trait. People whose skin that can stretch without tearing (stretch marks) has a higher level of a substance called elastin, which allows the skin to stetch. Without sufficient quantities of this substance the onty way to get rid of the excess skin is with plastic surgery. Exercise will tome the muscle in the area, but you also cannot lose weight in one area alone by exercising that region.
Anything that gets your heart going can help with weight loss, but only if you're simultaneously monitoring your diet. If you're overeating it really doesn't matter what you do for exercise, you still won't lose any weight. Situps can help tighten your abdominals, which can improve your shape even if it doesn't lose you much weight.
It is very difficult to lose weight in a targeted area like the stomach. The most effective way to get an attractive stomach is to focus on overall fat loss while toneing abdonminal muscles. Exercises like situps and crunches can help tone, while vigorous cardio exercise helps with overall fat loss.
Diet and exercise are both good ways to lose weight, but something like crunches probably aren't the best idea to lose weight without some type of cardio. If you just want to lose weight, I would suggest at least 10 or 15 minutes of cardio exercise a day, whether it be running, doing jumping jacks, whatever.. As long as it gets your heart pumping. In the lines of crunches, if you are specifically trying to…
How can you lose weight at the very bottom of your stomach if you are 5'10'' and 210 pounds and you are very athletic but you have that one problem area?
You cannot really 'target' fat as such, so exercise on a bike will be food as you will lose fat if you do the right intensity workout. You can though work the muscles underneath the fat which will improve tone around that area. The bike wont help with that, but crunches and sit ups will. If you combien situps and crunches with time on the bike you'll soon shift the fat.