Hey Hitmandonny. If you haven't cycled much before it will take a bit of time to get used to it but lets say you start off being able to cycle at 30 kph average. Thats 1 k every 2 mins so it would take you about 1 - 1hr 10 mins to cycle that distance. That kind of pace is fine for someone starting on a bike. If you are on a mountain bike that's the sort of pace you might expect at first. If you have a road bike it might be a bit quicker. After a while you will get quicker and should get in under the hour. My experience was that I used to run a lot and got into mountain bike riding after a bit of a bmx racing stint when I was young. I rode to University and training as well as running and got into running straight off the bike which is great for the legs. My running times came down quite a bit too. One thing I found good about biking to things was the increase in leg strength. This should help with punch power but if weight is an issue this would have to be weighed up because muscle can weigh a bit. I used to think my legs were strong untill i took up bike riding. I reckon you should be able to get under that 1 hour soon enough.