You should start stretching at a slow, safe level, but never increase your frequency, intensity, or time.
<h2><em><u>Partner-assisted stretching can cause injury.</u></em><em><u> </u></em><em><u>this</u></em><em><u> </u></em><em><u>one</u></em></h2><h2><em><u>You</u></em> should stretch your muscles that you feel need to be stretched at any time of day.</h2>