These can typically be done in the privacy of your own home with little to no equipment. There are many tutorials and bodyweight exercise programs online. Most of these will include exercises like body squats, some form of pushups, planks, possibly pullups, dips, and certainly several types of core exercises. This type of resistance training is a wonderful way to get started with strength training and requires no commute and no (or very little) financial investment.
To stretch your quadriceps, start by standing behind a chair and grabbing it with your right hand. Bend your left leg behind you and grab your foot with your left hand, making sure to keep the thigh as close to perpendicular to the floor as possible. Hold the stretch for about 30 seconds or long enough that you feel the stretch in front of the bent thigh. Release the foot and repeat on the other side. The National Institute on Aging Web site features other great stretches for the lower body, including the hamstring and calf muscles.
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