Avoid simply copying friends at the gym! This ususally lead to injuries and long-term joint problems. To spare yourself such issues, you need to educate yourself on how to train correctly.
I promise you that if you follow the advice in this book, you will increase both strength and size within a few weeks.
No Fluff or Bro Science! With this guide you will build muscle faster than ever!
The bottom line is you CAN get bigger and stronger with just these exercises. No need for fancy equipment or a personal trainer.