Cross Training for Rowing.
This can be a great cross training tool. It can be used to control weight, improve endurance, boost your CV system, improve your AT and make you mentally stronger.
Great for endurance.
Excellent for strength training for rowing. Tweak the weight, reps and exercise and you can work anything from flexibility to endurance to strength to raw power.
Great for endurance and aerobic/high aerobic training.
If you live close to a hill, hill running can boost V02 Max, endurance and strength for rowing.
Good if you live in the mountains, lost of cross-country skiers use this for long endurance workouts in the summer.
Have fun, why not? Once you stay injury free, playing a game that requires a lot of running is great for building endurance and power.
All of the above will help you to learn new skills and use different movements, biomechanics and energy systems. This can only be a good thing, particularly if you have rowed for a long time and need a lift up to the next level. Alternative training for rowing will help you stay mentally fresh, help you stay physically balanced (thus hopefully preventing injury), and provide you with a new skill set to apply in adapting to changing rowing conditions, challenges and goals.
Lots of specific cross training workouts for rowing coming in Spring 2015.