Here are six ways exercise can help improve overall mental health and outlook that you can share with your clients or participants:

1. Exercise increases the production of brain-derived neurotrophic factor (BDNF), a neurotransmitter that can stimulate production of new brain cells. Both cardiorespiratory and muscular training can help elevate levels of BDNF, which means that these forms of exercise not only help you become more physically fit, but they can also boost your brain health. 
2. Exercise improves memory and learning and reduces or slows progressive loss to brain cell structure and function. In addition, exercise improves brain health by enhancing its ability to grow and adapt in response to stimuli (neuroplasticity) by reorganizing its connections, structure and functions. In other words, exercise may ameliorate some of the inescapable brain-related changes that occur with aging. Improvements in cognitive function and neuroplasticity can be observed in both young and old and both healthy and clinical populations. While cardiorespiratory and muscular training create unique neurophysiological adaptations, the combination of both types of exercise leads to more exercise-induced neuroplasticity than either mode alone. In other words, different types of exercise improves brain health by targeting various aspects of brain function.
3. Exercise can help boost self-esteem, which may positively affect your mental health. Learning how to perfect that yoga pose, finally doing a pull-up with your own body weight or lifting a certain amount of weight for the first time can leave you with the feeling that you can achieve specific tasks that you set out to accomplish, which is one of the best ways to boost self-esteem.
4. How awesome do you feel after a good night’s sleep? Sleep is when your body repairs itself after the challenges of the day and is an important component of good mental health. A good night’s sleep is also critical for your brain to recharge and refresh, and regular exercise can enhance your quality of sleep, which can leave you feeling great all day long. 
5. In this non-stop world, where you’re constantly being texted, emailed and generally pulled in all directions, having the opportunity to take time out of your day to focus on you may help improve mental health. Time spent exercising is an opportunity to unplug from other people and listen to your favorite music or catch up on your favorite hobby via a podcast. This, in turn, can help you change how you feel and improve your overall outlook. 
6. Taking group fitness classes or simply being at a gym surrounded by other people working toward improving their health can help you connect with others, which is an important component of good mental health. If you’re new to an area or going through a major life change such as a break-up, your workout time can be the best opportunity for meeting new people and making new friends. Many fitness studios and group classes become mini-communities and are an excellent way to improve your real-life social network, which can have an immediate impact on your mental health.