Absolutely bike riding is a good form of exercise. You can ride a bicycle just about any time of the year in many locations and it is a relatively inexpensive activity. Cycling increases muscle strength and tone of the legs, cardiorespiratory function and burns calories.ny exercise that makes you move is a good exercise. Biking is one of my favorite exercises. My knees never hurt no matter how many miles I pedal. It is easier on the joints than running.
The U.S. Air Force title Sergeant (E-4, equivalent to an Army or Marine Corporal and Navy/Coast Guard Petty Officer Third Class), commonly and informally referred to as buck sergeant, was used beginning in October 1967 in the hope that the prestige of being an NCO would increase the re-enlistment rate. The title was phased out again in the 1990s.
The last Buck Sergeant I remember seeing was in 1997 before he was kicked out at his 10 year mark. As far as going from AD to ANG or Reserve, I guess it would have depended on the contract that was signed at the time of transfer, but I believe they did away with Buck Sergeants through attrition as well.