I am convinced more people need to learn to road bike. I truly am amazed at the possible workout difficulties you can achieve while biking. Running hurts after enough miles, swimming is just uncomfortable 99% of the time it seems, too hot, too cold, etc., lifting isn’t fun to do cardio with.
But biking, you can go hours while biking and completely deplete your body of all your resources, pushing your body to the limit.
With biking added I can now workout longer and harder than ever before. It can seem expensive to get the right bike, but cycling has quickly become my workout of choice for the hard days and the relaxing ones.