For Sam's marathon training, the two correct adjustments he should make to his nutrition and hydration routine are:
-
Eat more carbohydrates before physical activity. - As his training duration increases, so does the need for energy, which can be met by consuming more carbohydrates before exercising.
-
Carry a reusable water bottle and frequently hydrate. - Staying hydrated is crucial when training for longer periods, so having a water bottle and drinking frequently will help maintain hydration levels during his training sessions.
These adjustments will better support his increased training demands.