An interesting bit of work, and it does raise plenty of questions about how various 'sports' compare.
One distinctive feature about running is that it's fundamentally controlled by mechanics. The leg is a pendulum, it has a natural swing-speed. People with short legs take shorter strides, but their leg cadence is higher, largely negating the effects. Hence why elite runners aren't all 2 metres + tall .... and small children can easily keep up walking with their parents, despite being half the height. So runners tend to have a naturally tight spread - it's tough to take big strides, and force a pendulum to swing quicker, but you can't really run 'slow' , all you can do is take intentionally short strides. Or stop a lot if you're a real amateur!
Cycling is a 'tight spread' activity too, the laws of aerodynamics work against you. Travelling 2% faster requires 6% more power. You would need a lot of training to strengthen your muscles/heart/lungs, to achieve a rather miserable speed increase.
