Outdoor exercise classes at Gerrards Cross Lawn Tennis Club, Bull Lane. Nature is powerful, if not the most powerful contributor to personal health and fitness. When you work out in the fresh air, you enhance your physical, mental and emotional condition and it also brings constant inspiration. When you spend time outdoors, especially being active, you can lift your mood and think more positively, it reduces stress related anger and sunlight directly affects the levels of serotonin. You'll work harder outside, its scientifically proven, working outside really does boost your energy levels!