Every extra kg of muscle is estimated to contribute 21kcal/day to the RMR. If you put on, say, 15kg of muscle over a few years (quite doable if you are very sedentary and have low muscle mass), that's an extra 300kcal/day. Add in 30 mins of biking a day, and say 100 cal from strength training on average, that's a good 600-700 calories per day!
Every extra kg of muscle is estimated to contribute 21kcal/day to the RMR. If you put on, say, 15kg of muscle over a few years (quite doable if you are very sedentary and have low muscle mass), that's an extra 300kcal/day. Add in 30 mins of biking a day, and say 100 cal from strength training on average, that's a good 600-700 calories per day!