I train by myself for the most part during the week and have for years. It's not optimal but I've figured out how to make it work for me.

Wednesday

low box squats with SS Yoke bar - 12 inch box

150 for 5 sets of 5 reps

 

walking lunges

bodyweight for 3 trips of 50 feet

 

cable crunches

100 for 3 sets of 15

 

hanging leg raises

3 sets of 15 reps

 

Thursday

deficit bench - used a barbell with 1.5 inch camber in the center

225 for 5 sets of 3 reps

 

low pulley cable rows

130 for 3 sets of 20 reps

 

h-raises

20's for 1 set of 8 reps

30's for 2 sets of 8 reps

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