What is the best way to increase my anaerobic threshold? i work out 5 days a week, currently.

Anerobic Health: Do weight training three times a week, make sure you work to fatigue each muscle group, no more than 6 to 8 repetitions and weight that just allows you to barely reach last rep. Stick to a plant based diet and supplement with at least one protein drink per day, at least 15 grams of protein in each drink. If you don't find improvement consult an exercise physicologist. My best.

Intervals: Interval training can increase your anaerobic threshold. Since intervals involve high intensity bursts with brief rests, they can challenge your anaerobic system and train it to adapt. Gradually increase the length of time of the high intensity portions over time, and you should see your anaerobic threshold increase.

Interval Training: Your "estimated" lt (lactate threshold) is the hr at which you can sustain vigorous activity for 15-20 minutes (50-80% of vo2 max). Raising it means being able to tolerate higher intensity exercise longer. (a) 2x/week do 3 5-10 min high-intensity intervals at 95-110% lt or (b) 2x/week one 30 min high intensity effort at 95-110% lt. It'll work!

Heavy wts 3x/wk: Do weight training 3x/wk, making sure you work to fatigue each set with a target of 8 to 10 reps per set. Protein drinks can help build mass so supplement with at least one protein drink per day with at least 15 grams of protein in each drink.