On time speeding up

According to Einstein, "if there was no matter, time wouldn't exist." As I age, I have been gaining weight. Part of me wants to blame the fact that the universe is expanding at an increasing rate... I also noticed that time flies faster. Long story short, I think that if I want time to zoom by at a more normal pace, I should exercise more and lose weight... because there are moments I think time is moving way too fast... especially on monday mornings when I wonder, where the heck did the weekend go :p