I have to laugh about the coffee creamer because I was going to do that as well but then decided that had to be the last to go! A girl’s got to have something!!! I will say the yoga definitely works on the core!! I love the sculpt too because it encorporates the weights as well. Maybe Klayfish would have some ideas. One thing I did a few years back that was great was P90X. It used weights, cardio and yoga. Plus you can do it in your own home. I think one of the questions you would have to ask is whether you are really challenging yourself in your workouts? I think I ran for so long, same distance, same routes, there was really no challenge. I had to do something that was different and when I am done with yoga I am absolutely exhausted and fairly sore the next day. Interestingly, after one class there was a lady that went up to the instructor to discuss the sculpt class. They were offering a new 45 minute class instead of the usual 60 minutes. After class this lady said she did not like the class because it was not long enough. She said she needed a longer challenging class. However, I noticed during the class she modified every move. That is fine, I modify some things but to say the class is not challenging but you don’t use weights or sit further back in chair pose or whatever is on her not the length of the class. Anyway, I hope this helps a little! It’s tough when your body changes with age and the same old things don’t work!
IMO, to the bolded part above, x1000 times yes. The caveat I'd throw out is that any workout, even if one where you stop challenging yourself, is better than doing absolutely nothing. But if you're really looking to get fit, then you always need to challenge yourself. Doing the exact same thing day in day out, for months, years, will be a steep diminishing returns investment. You've got to challenge yourself and look to have some variety.
Sorry, I really can't give a lot of input on P90X or cardio/yoga stuff. I don't mean to sound negative, but there are a lot of workout trends/fads that come and go...P90X, hot yoga, cold yoga, thunderstorm yoga
, etc...they all tend to have some variety of cardio and mild strength training. Again, don't get me wrong, as I said before any workout is better than none, so I would wholeheartedly 110% support people who pick up any style of an exercise routine, whether P90X or spin class or underground yoga. However, DW and I are more "old school" in our approach...maybe because we are old(er). Here's our routine....
Wake up at 4:10am. Ouch.
In the gym by 4:30am. We both start out with pure weightlifting. Barbells, dumbbells, Olympic bars, weight machines, etc... We divide our week up...one day is leg day, one is arms, one is shoulders, etc... I can't tell you precisely what DWs routine is, as we both sort of do our own thing. But generally speaking, I'll do 3 supersets, 4 rounds each. In other words, this morning was shoulder day for me. So a "superset" would be a set of 10 front raises (or as close to 10 as I can get), immediately followed by a set of 10 side raises. Take a rest, then do it again. Rinse and repeat 4 times. Then move on to the next superset. DW does a bit more volume than I do because I have much bigger time constraints (my commute is 60 miles each way, hers is 1.6 miles). I lift for about 50 minutes and then do 10-15 minutes of cardio. DW will do 60-80 minutes of lifting with 10-20 minutes of cardio. On days I work from home, I can stay longer and I'll do additional cardio just to keep my endurance up some. We do a huge variety of weightlifting exercises, varying it up often. But there's no P90X style stuff involved, it's just old fashion lifting. I'm pretty strong, especially in the upper body, but DW can do things on leg day that would send me to the hospital. It gives me a healthy fear of her...one swift kick and I'm done for.
DW has a "coach", but it's online and done through e-mail and pictures. I don't have a coach, just do things based on research and reading I've done over the years, and talking to others into the hobby.
, the health numbers moving! 
