Volleyball season is coming up, I want to come back stronger than last year.

I need a strong core, calves and triceps and biceps for this season. Any tips for home work outs? With out weights? I've asked my older brother who was in wrestling to help me with the weight room area I need. Since he started work, I've decided to do some work outs at home when I can't go to the weight room with him. Also, any detox smoothies or protein shakes ideas? I'm new to all of this and would like in any way.