Are there any work outs that will boost my stamina?

I want easy 10-20 minute workouts to do before work I must leave about 8:20 and I get up at 7:15 so any ideas would help!

so I am 14 5'8 (tall) 149 (squishy) I would like to know some good ways to work out that help you loose weight fast. I would...

What are some good home work-outs ? any good routines? EXAMPLE) 20sit-ups 10 jumping jacks ...

ok...so im goin on vacation in the summer and i want a tight and flat stomach...it's not there yet, i have this small pouch b...

I'm trying to work out alittle bit but it seems when it starts to burn, I just quit. But if I keep on doing that, I'm not go...

I do loadsss of sit ups everyday because im trying to get a flat stomach, do sit ups help at all to get a flatter stomach? ho...

Preferably with as little or compact of equipment as possible. And no exercise bike... I can't use them because of my knees.

How do they work, and what exactly do they do?

does that ab belt achully work? you know that contoar belt?

I need Help With MY uper Body Work OuTs. Im a Dude also lol and things you recamend I do?