Walking, riding your bike and yoga is definitely enough! Especially if you do it for an hour and a half every day!!! Yikes. That's quite the workout schedule. For my workouts, it depends on the time of year. I do pilates 3-4 times per week year round, I typically do Yoga in the winter, I workout at the gym (lifting weights - 3 x per week except in the summer) and I play ultimate LOTS and LOTS and LOTS in the summer!