D2 Collegiate runner here looking for a training flat/shoe to train in for workouts this upcoming indoor season. I am looking to focus on the 800/Mile this indoor season so am looking for a shoe I can run some fast 200s & 400s in workouts because I don't prefer to spike up until races (We train on a 200m indoor track). Last year/currently using the Nike Streak LT 4 which I enjoyed, but they are currently shot and giving my calves issues the past few workouts. Was thinking about the Nike Streakfly (kinda more distance orientated) and Adidas Takumi Sen 8 (Leaning towards these), if there are any better options or shoes you prefer from experience please share!