too heavy irons?

[southwestgolf]

since 8 months I play with the titleist AP2 with the precision rifle shafts.
I always felt good with these irons, but since 1 month I feel very tired after the practice with the irons. My father (my actual coach is away some weeks) tell me that i feel tired because I need to build up my body. But I think that is due to these new irons.
Should I refit my irons? I say yes, my dad say no.

[DJYoshi]

since 8 months I play with the titleist AP2 with the precision rifle shafts.

I don't think you need to be refit. you're a 2 HC. If you're hitting the irons well, just start out by doing simple exercises at home that help build your golf muscles. Stretching works too so you're not fatigued and your muscles are elongated so they're capable of the torque that you're putting into them with a heavier club. I went from swinging graphite x-16's to mp-60's with the rifle shafts and they're MUCH heavier....but with the right work out regiment, I can't swing anything in graphite other than my woods

[ks8829]

You are right, I played rifle shafts 5.5 in my mp30s and when I bought my mp33 with dynamic golf r300 shaft, I immediately notice a big difference in weight. the booklet from Mizuno has the shaft specifications and heres what I found out

the rifle shaft 5.5 frequency weights 110-133grams

the dynamic golf r300 weights 127grams. there was a possible 6 grams of weight difference.

I would bring one of your clubs in the golf store and swing the dynamic golf comparable flex and see the difference for yourself.