Good morning everyone.
Bought a new pair of rollerblades on Saturday, so I'm sure you can guess what I did for exercise this weekend.
I'm really stoked because I haven't gotten a new set of wheels since like '98. Apparently ABEC 5 is what comes standard, and I don't care what people say, there's definitely a noticeable difference between ABEC 1 and ABEC 5.
Anyhow, to this morning's workout: Legs and Shoulders:
Superset: Snatches / Upright Row: 155*3 / 115*12
Split Squats: 155*12 (each leg)
Hamstring Curls: 65*5
Rear Delt Raise: 25*15 (note to self: use higher weight next time)
One-footed Standing Calf Raise: 120*15 (each foot)
Roll-outs/Walk-outs: 7 / 12
Workout was ok today. A little disappointed with my performance on my snatches, but whatever. Had to add split squats into the mix because I haven't done them in a while, and think they're a totally awesome exercise.
Lastly, the science term of the week.
Static Friction - I figured since I was talking about ABEC bearings earlier, this would be a good subject to hit up. There's essentially two kinds of friction: static and dynamic. ( Static friction is the force opposing the effort on a surface which does not slide or skid, and offers a stronger force than dynamic friction. A good example is anti-lock brakes, which the brake pad pulses on the wheels, so that the wheels do not skid . This allows your wheels to maintain static friction with the ground.
Anyhow, the argument against higher ABEC rated bearings is that the bearing is still in contact with the axle, thus friction will slow you down. The issue with this is that the naysayers negate static and dynamic friction. In this case we can look at the difference between the friction in the bearing verus the friction in the axle. Then you'll see that the bearing friction <<< axle friction. Because the friction on the axle is so much larger, we can assume it to be static, in which case no (or very little) net work is being done on the axle; therefore, energy loss is occuring at the bearings. By reducing the friction at the bearings, energy loss is decreased, allowing for a longer distance to be travelled per stride.
Oh, and ABEC is an acronym for Annular Bearing Engineering Committee. It is just a rating system for bearings, and has no real special meaning.