My experience- is yes!!! i feel like a BOSS tycoon riding around on my track bike. On a fixed gear you rely less on mechanics and more on strength. your not depending on your shifter/derailluer/cables to make it easier on you, so you work harder and get stronger!!
now of course there are other advantages to having gears, like working more effeciently by using gears to your advantage. so dont start bashing away just yet
fixed gears are awesome, and so are road bikes they both have unique elements that fit better with certain people. me, i love fixed gear its sustainable and practical in times like these