Everyone reacts to stress differently. Offering a single stress relieving activity like yoga classes won't please everyone. To find out what your employees need , consider offering a survey measuring stress levels and asking what stress-relieving activities each employee enjoys. Take the most popular choices and act on them. Negotiate discounted memberships at local gyms, bring in yoga teachers, hire a licensed masseuse to give chair massages. Some companies have a quiet room for meditation breaks. If money is an issue, partner with your health insurance company or EAP to offer something that the company can afford. The worst response is to do nothing and the best response is to try something and then measure the results and act accordingly.