1. Most studies claiming to debunk Super Slow are nonsense. A new Super Slow trainee, or someone particularly elderly or frail uses as many as 10 repetitions per exercise - over 3 minutes of time. For normal adults, once they are comfortable with Super Slow, repetition numbers go way down, to 2-4 repetitions for most upper body exercises and 3-6 repetitions for most lower body exercises.
One near constant at this age is stiffer joints. Movement of all kinds — which floods joints with oxygenated blood — is helpful. But mobility and flexibility exercises that involve large, controlled ranges of motion in the ankles, hips, shoulders, and upper back can be particularly effective. Try a yoga class, and work mobility into your daily routine as well — anytime and anywhere. Gently stretch however it feels good, and as often as you remember.
The Alfredson protocol for Achilles' tendinopathy is actually two separate exercises.  To perform the exercises, you must have a small step or curb on which to stand.  Be sure to check in with your doctor or physical therapist to ensure that it is safe for you to exercise and that you are performing the exercises correctly.   Here is how you perform the Alfredson protocol:

Also important to know is how to determine how much weight you should use. Start with a light weight and perform a set. Continue adding weight until you can do the desired number of reps with good form, which includes moving slowly enough that you're using muscle—and not momentum—to lift the weight. The last rep should be difficult, but not impossible, and you should be able to keep good form while doing it.

Aerobic exercise also helps relax blood vessel walls, lower blood pressure, burn body fat, lower blood sugar levels, reduce inflammation, boost mood, and raise "good" HDL cholesterol. Combined with weight loss, it can lower "bad" LDL cholesterol levels, too. Over the long term, aerobic exercise reduces your risk of heart disease, stroke, type 2 diabetes, breast and colon cancer, depression, and falls.
Early motor skills and development have also shown to be related to physical activity and performance later in life. Children who have more proficient motor skills early on are more inclined to being physically active, and thus tend to perform well in sports and have better fitness levels. Early motor proficiency has a positive correlation to childhood physical activity and fitness levels, while less proficiency in motor skills results in a tendency to partake in a more sedentary lifestyle.[20]

You acquire 100 new shares, giving you a total of 160. You simultaneously sell 50 shares of the exercised options to pay the total exercise cost ($2,000 ÷ $40 = 50 shares), leaving you with 110. Additional shares must be sold to pay for broker fees and, if exercising NQSOs, withholding taxes. After the exercise, you might own less than the 110 shares.

One way repeated ANOVA was used to compare pre-exercise neuromuscular parameters between sessions (S1, S2 and S3). As no pre-exercise (pre) neuromuscular parameters differed between sessions (except EMG RMS RF at 60 deg/s), all pre-exercise parameters (except EMG RMS RF at 60 deg/s) were averaged. Neuromuscular parameters were then analyzed with one-way repeated measures ANOVA (time: pre, exhaustion, P20 and P40). Significant effect of time was explored with planned comparison (pre vs exhaustion, exhaustion vs P20, P20 vs P40) adjusted with Holm-Bonferonni correction. Cohen’s effect size f(V) was also calculated.
Results Maximal blood lactate concentration was lower in OTS compared with NFO, while resting concentrations of cortisol, ACTH and prolactin concentrations were higher. However, sensitivity of these measures was low. The ACTH and prolactin reactions to the second exercise bout were much higher in NFO athletes compared with OTS and showed the highest sensitivity for making the distinction.
(3) Recovery Phase (<60% HRR). Postural control and spine mobility exercises in a quadrupedal position with the platform support, exercises of static balance over either 4 or 2 supports, eyes either open or closed, and with core muscle activation. The latter phase also included various poststretch exercises to restore the preexercise muscle length.