How about a... 50 Squats Challenge? Squats are one of the most effective exercises that involve almost every muscle group in the body, helping you to: 1) Burn more fat 2) Build more muscle 3) Tone your legs and butt (summer is coming! smile emoticon ) You can use this video as a squats counter as well, in case you were looking for a squats countdown! Let me know in the comments below how many squats you managed to do! Let's Go! Let's connect on Facebook: http://facebook.com/robertasgym