Bill McKenna wrote:
I would have dialed down your ISO, which would cause your shutter speed to come down as well. You don’t need to be at 1/3200 on your shutter speed to get sports images sharp. You’ll lose nothing in terms of frozen sharp focus at 1/1600, and you’ll have less grain in your shots because you’ll brought your ISO down.
First I do agree with others here that it is more important to get the shot with a fast enough shutter speed than worry about noise. I never lost a publication or a photo contest due to noise in an action shot, and there are superb noise reduction programs like Topaz Denoise AI and DXO Prime now that pros and amateurs alike swear by when they need to use higher ISOs .If you are forced to shoot a slow speed, then try panning with the action.
As a photojournalist shooting pro sports for 47 years and with Sports Photo awards from World Press Photos, and Pictures of the Year competitions, I respectfully disagree with your statement Bill McKenna, and I will explain. .
Faster action from pro athletes can require faster shutter speeds than in slower amateur athletics. And also VERY IMPORTANT is the direction of the action. Action coming towards and away from you will require less shutter speed to stop the action, but fast action going across the frame will require a much faster shutter speed to stop the action, unless you are purposely panning with a slow shutter speed.
Also the higher megapixel sensors in today's cameras will require a faster shutter speed to stop that action as the greater pixel density of those higher megapixel cameras mean that fast sports action will cross more pixels of your frame so you will need a higher shutter speed to stop the action in those cameras.
An example: the same action that I could freeze with 1/1000 sec. on my 24mp Sony A9, now requires me to shoot at 1/2000 second on my 61mp Sony A7RIV and 50mp Sony A1. You have to know and understand the physics here.
Just like any sports action, as Bill pointed out, if you want to stop the fast movement of those wing tips in Birds In Flight shots, you will often need 1/4000 sec.
In addition to my long pro career, I am also a longtime Professor of Photography at the state university level, with a Master's Degree in Digital Photography. I have to know this stuff and teach it to my hundreds of students over the years in my Photojournalism, Digital Photography, and 35mm B&W film courses I write and teach.
Here an action shot, with the action going across the frame, shot on my 50mp Sony A1, 200-600mm lens, at 600mm, f6.3, ISO 1000, 1/2000 second. This shot could have even used a 1/4000 sec. shutter speed. Boys pulled by fast speedboat on Brookings Lake, Manistee National Forest, Michigan.
The 50mp Sony A1 shot of the White Egret taking off from its watery perch on the Caribbean island of Sint Maarten/Sint Martin needed 1/4000 sec. shutter speed to freeze both those wings and the water splashes. 200-600mm lens, 319mm, ISO 320, f6.3, 1/4000 sec.
Cameras have advanced so far and some pro mirrorless cameras can shoot at 1/32000 sec. and even 1/64000 sec. When I need to use a high shutter speed, I do. Don't be intimidated by those who tell you NOT to use all the capabilities in your camera.
Cheers