As someone who sees many people 50 plus, I recommend that you make sure your blood pressure and lipids are in check. Those are the two main factors contributing to mortality in the hospital, and cause a variety of issues such as strokes and accelerate cardiovascular aging as well as strain on the heart, specifically left ventricular hypertrophy. Adding masteron will somewhat help with your estrogen sides, but will also disrupt your lipid profile. If your lipids are high, it wouldn't be a bad idea to look into either atorvastatin or Rosuvastatin to make sure your LDL are within appropriate levels.

Additionally, watch your blood pressure. Low dose Losartan wouldn't be a bad idea just to keep it in check. I know many individuals like to add both anti blood pressure and lipid medication as ancillaries during blast cycles. Also wouldn't hurt to use it off cycle to maximize your health. Only use if needed.

Post got my attention since I’m also 50. I just started competing last year at 49. Also know some other brothers close to my age who compete. To be honest, at this age we run cycles where we don’t need AI. (These doses are only heading to a show) Rest of the year 250-375 susta. So for me, that means 500 mg susta and 250 EQ. Everybody’s different though. So you’re gonna have to find out what works for you. Look at it this way. If you’re taking something and you have to fight all the side effects, just lower the dose. High blood pressure, high lipids, missing sleep is much more detrimental at our age. But, I also run HGH with every cycle for the last decade. I run L carnitine 400mg/ day (injectable) , vitamin b12 injections 1250 mg every 2 weeks during blast. Glutathione, and of course multis, omega 3s. Last year I went Into my cut, no ai needed. Big bonus, your body likes growing when its healthy. So by lowering doses and not needing caber or ai etc. I grew. I was shocked because of my age. I wish I ran healthier cycles when I was younger. I would been unstoppable.

Some guys giving you some really good answers on here mate - you would normally have to pay someone for help like that.

Whaat Ya Gonna Doooo!!!!

Smfh

150mg test at most, or are you trying to die earlier?

You should look into telmisartan for your BP issues. It's an ARB, it rarely has side effects as long as you don't consume an insane amount of potassium. Every client I've recommended it to has normal blood pressure while running it. PEDs cause blood vessels to constrict, and your blood has to pump harder to push it through, telmisartan keeps the blood vessels wide open allowing the blood to flow freely. Most vendors sell it, it's cheap if you order international. 40mg daily is the recommended dosage, 80mg if you have really high BP. I think anyone running cycles should be on it for longevity and heart health.
If your goal for next cycle is muscle growth I would replace the masteron with primo and drop the armidex once you dial in the dosage. 70% of your test dosage as primo seems to manage e2 for most, 80% or even 1 to 1 ratio for high aromitzers. 600 test 420 primo is a great cycle. Diet can always be cleaned up, very low fat, high carb from fruit, grains, vegetables. Diets like mixed fruit, honey, dates, prunes, sweet potatoes, broccoli, Asparagus zucchini, chicken, white fish, 99/1 turkey, 93/7 lean beef. Lock in it for the next cycle and skip the cheat meals unless you have to like for events or date nights but still choose chicken rice veggies. Make sure key supplements are there, tudca, ox bile, glutamine, glutathione, vit E, Vit K + Vit D, Magnesium, citrus Bergamot, berberine, hawthorn berry, tumeric, fish oil, krill oil, TMG. Drop the orals this cycle for health management, save them for the last 4 weeks. You can run pretty much any oral except for the hard hitters like superdrol mtren halo for 4 weeks, after 4 weeks you recover very quickly if diet and supps and sleep is locked in. Alot of trt clinics are prescribing 100mg deca with with test you could look into that after doing some research. Plenty of options. I've had great gains with 600 test 420 primo 8iu GH and 50mg anadrol last 4 weeks with bloods within range, small hit during the last 4 weeks and then back to normal 4 weeks later. Same with 600 test, 400 npp deca, 20mg cardarine and 1mg Retatutride lipid management, supplements locked in. If you don't want to pack on muscle and just lean gain, sticking to the Test Mast I'd great too but definitely add the telmisartan. Good luck bro!
**Bonus tip, if you want a diet that reduces bloating dramatically try this. On lifting days, eat your normal low fat high carb high protein diet, on rest days, eat only fruit and honey. Bags of mixed frozen fruit, canned pineapples Pears Mangos peaches, cherries, honey drizzled on top, and you'll expereince the flatest bloatless stomach you'll ever have. You won't be sore, you won't become diabetic, you'll have tons of energy, full of glycogen, improved lipids as long as supplements are there, and you'll have a new look you've never seen before.

Most guys at 50 are gassing out walking up stairs, and you’re still in the game, pressing iron and running cycles. Salute.

Now let’s get into it.

You’re 6'3", 225 at 18% , not bad at all, but here’s the truth:

You’re not trying to be a monster anymore, you’re trying to look good, feel strong, stay alive, and not wreck your BP or cholesterol while chasing it.

And you already noticed the sides:

Water bloat on 600mg Test

Lipids took a hit

Anavar lit your BP!!

So now you’re looking at Test + Mast?
Smart move.

Here’s why:
Masteron (DHT derivative) won’t aromatize --> less water, drier look
Mild AI effect --> might actually let you lower your Arimidex
Improves mood, libido, and hardens you up without the bloat
Also: it plays nice with Test C and doesn’t nuke your system like orals do

Here’s a clean, low-side 50+ Friendly Cycle (12 weeks):
Test C – 300–400mg/week

Mast E – 300–400mg/week

Arimidex – 0.25mg twice/week (only if needed after bloods or signs of high E2)

Optional: low-dose GH (1–2 IU pre-bed) if your wallet doesn’t mind and you want better sleep, skin, and recovery

If your libido tanks or mood crashes on Mast, it’s often because you dropped estrogen too low. So always monitor labs — don’t go full AI goblin mode “just in case.”

Bloods:
Pull labs before, at week 6, and after.
Watch E2, lipids, hematocrit, BP, PSA, and kidney function. At 50, these aren’t optional — they’re survival gear.

Final Thoughts:
Drop the 600mg Test. You're not 25. That dose is doing more harm than good.

Masteron is a great addition, but don’t expect it to be a miracle cutter. It shines when you're already lean (12% and below). At 18%, it’ll help, but don’t expect to walk around granite-hard unless diet’s dialed too.
Focus on recomp: get leaner, hold size, stay healthy.

Respect for doing this with some brains behind the barbell.

Forget chasing old-school blast mentality. At 50, this is about optimizing, staying functional, lean, strong, and not nuking your health to add 5 pounds of water weight. Less is more, when it’s the right compounds.

And just for you here is a little extra cause why the hell not:

TRT Lean-Out Bridge Protocol
Perfect post-cycle to drop fat, preserve muscle, and give your body time to normalize

Goal: Maintain strength, recover internal health, slowly get leaner

Weekly Plan:
Test C – 125–150mg/week

Mast E (Optional) – 100–200mg/week for extra polish & SHBG support

Aromasin – 6.25mg twice/week or Arimidex 0.25mg 1–2x/week

GH – 1–2 IU pre-bed (optional but excellent for fat loss, sleep, recovery)

Metformin – 500mg twice/day (optional: helps insulin sensitivity, lipids, and fat loss at 50+)

Cardio:
Fasted cardio 3–4x/week (30–45 mins), ideally walking incline or cycling

Keep cortisol low. No 2-hour death marches.

Diet:
Drop cals to maintenance or slight deficit (10–15%)

Keep protein high, carbs around workouts, fats steady

Monitor weight weekly, not daily

Use this bridge to let your lipids recover, hematocrit normalize, and maintain fullness while you lean down.
Don’t rush into another blast. Let the body stabilize and catch up