This is an awesome exercise for everyone, but especially for runners as well as athletes who need to move from side to side. Try it if you run or play a sport like hockey or soccer. At home, try the "stealth" version. Do the exercise as you do household chores. At the gym the exercise is usually called a side lunge. Hold a weight. Try for 3 sets of 10-15 reps each leg!
The next time you are doing laundry, why not try to get buns of steel? Multi-tasking is the order of the day: Before you pick up the baskets, do some squats. Start by standing in front of your laundry hamper.