Designing a functional training program for snowboarding requires consideration of your goals, level, and availability. Generally, you should train at least three times a week for 45 to 60 minutes, and include components such as a warm-up, strength and power section, balance and coordination section, and mobility and flexibility section. For the warm-up, you can do dynamic stretches, light cardio, and activation exercises for your core and glutes. The strength and power section should focus on building lower body and core muscles with exercises such as squats, lunges, deadlifts, step-ups, kettlebell swings, and plyometrics. You can also add some upper body exercises like push-ups, rows, pull-ups, and shoulder presses. The balance and coordination section should challenge your stability and proprioception with exercises like single-leg squats, single-leg deadlifts, single-leg hops, planks, side planks, mountain climbers; you can also use equipment such as BOSU balls, stability balls, balance boards or TRX straps. Finally for the mobility and flexibility section you can do static stretches, foam rolling or yoga poses for your major muscle groups.