They'll make you...(feel) much better.
feel
I've always enyoyed...(walk).but I didn't use to like running.
walking
Then, after...(buy) some expensive trainers, it felt much easier.
buying
I love running. It's a way...(keep) fit.
to keep
So, if you want...(do) more exercise, I'd recommend running.
to do
Just remember...(invest) in some good running shoes.
to invest