I recall doing a workout like this one, with a ton of 600m repeats and 300m repeats. It wore me out, but I liked it, as it gave me confidence in my ability to endure. Good luck with the workout.
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Brooks ELMN8, version 6, middle distance track spike, photo courtesy of Brooks Running
Your workout today is: April 21, 2022, Thursday: Warm-up, 4 x 600m, 400m jog between each, 3000m pace, 6 x 300m, at 1500m pace, 200m jog btw each, 4 x 150m, stride outs, 20 minute-cooldown
2022 RunBlogRun Spring Middle Distance Daily Track Training (800m-5000m), Week 15, Day 4
Monday: warm-up, 40-50 minutes moderate running, 6 x 100m stride outs, cooldown
Tuesday: Warm-up, 12 x 200 meters hard, 100-meter jog, the pace is 1500m, 2 x 800m, 400m jog, at 1,500m pace, 20-minute cooldown,
Wednesday: warm-up, 40-50 minutes, moderate running, 6 x 100m stride outs, cooldown
Thursday: Warm-up, 4 x 600m, 400m jog between each, 3000m pace, 6 x 300m, at 1500m pace, 200m jog btw each, 4 x 150m, stride outs, 20 minute-cooldown
Friday: warm-up, 40-50 minutes moderate running, 6 x100m stride outs, cooldown
Saturday: warm-up, 800m, 1,500m, 3000m, or 5000m, cool down
Sunday: 70-75 minutes moderate pace, on trails