Advice; age 45

Have been working out the past four months, 3-4 days a week approximately 45 minutes per workout. I have worked out in the past but took a 2.5 decade hiatus. Looking for exercises/lifts to maximize gains. As well as any areas I should look to improve upon. Been pretty down in the dumps recently and trying to get healthier more productive I guess. Thanks in advance and greatly appreciate any feedback.

Have been working out the past four months, 3-4 days a week approximately 45 minutes per workout. I have worked out in the past but took a 2.5 decade hiatus. Looking for exercises/lifts to maximize gains. As well as any areas I should look to improve upon. Been pretty down in the dumps recently and trying to get healthier more productive I guess. Thanks in advance and greatly appreciate any feedback.