Starting with the December 2014 issue, I am a contributing writer for TRAIN magazine. New issue hits stands November 27th with Tom Hardy on the cover. I have 8 contributions in this issue offering tips for people over age 40.
If fat loss is a goal along with improving muscle tone, then cardio should normally be performed LAST according to most research.
Why ? Think about the science of it and it makes logical sense ...
If you lift the weights when you are fresh, your glycogen reserves are at their highest - thus allowing more power for lifting. Then, when you move to cardio you have largely depleted those glycogen reserves so the cardio can more readily dig into the fat reservoirs for energy and thus contribute to fat loss. You get the maximum benefit from both activities.
The other way around (cardio first) ... you do cardio with full glycogen reserves and then try to lift weights in a depleted state. The result is less effective fat burning and weaker power for the weight lifting.
Michael Spitzer - Author - FITNESS AT 40,50,60 and BEYOND