I can only workout for 20 minutes before being exhausted? Tips?

[Anonymous]

I'm an athlete who works out 4 times a week. (I'm 18 by the way.) Anyway, I usually streach for 5 minutes, then I go on the treadmill for 15 minutes to work up a sweat (I put it on 3-4 incline, at a speed of about 6)

Then, I start with the workout. Problem is, I can only get through 20 minutes of the workout before my muscles are shaking, and I get dizzy.

I drink 3 bottles of water, so dehydration isn't the problem. Why can't I go for longer? Is 20 minutes my capacity?

Please help?

[Dtegesd123]

do intense cardio after your workout, warm up for like 5 minutes at 15% incline at 3.2 miles per hour ) .

eat a pre workout meal, carb up with about 30 grams.

rest more between sets.

maybe your a beginner with weights. Use lighter weights and stick to a 12-15 rep range.

don't go to fatigue on the first 3 sets out of a 4 set program per exercise.

[mysterydude]

I would try to add variation in your cardio, like jumping rope. Also make sure you eating enough food and eating healthy. I can get the same symptoms if I dont eat enough before hand

[rgb008]

You're probably working yourself too hard.
Run at a steady speed you can keep a pace at for a long period of time. Running on an incline isn't really good for you knees anyway.

[rgb008]

your knees**

[Asker]

really? I didn't know that...
I never run on pavement because it causes shin splints.

[rgb008]

Yeah I'm a treadmill runner for the same reason!

[GingerGuy]

This is after 15 min on the treadmill. Do you take any breaks? Dizzy is a sign you're working out too hard and/or too fast. Take breaks and you'll go longer. Nothing wrong with just 1/2 hour either.

[IBMtrait]

Try doing some work outs that will increase your stamina.

[Asker]

thanks!

[IBMtrait]

You're welcome