Dose 1; 13Mar2021, Dose 2; 22Apr2021 and booster Moderna Covid-19 vaccine: 18Dec2021; I am a collegiate runner capable to run 4min30sec miles at elevated heartbeats. Since having my shots i can barely run 7 min miles and my heartrate is 175-180 BPM.; I am fatigued continuously; I find that I have minimal energy; seem to have lactic acid buildup in arms; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 23 year-old female patient (not pregnant) received bnt162b2 (COMIRNATY), administered in arm left, administration date 13Mar2021 (Lot number: er8727) at the age of 23 years as dose 1, single and administered in arm left, administration date 22Apr2021 (Lot number: ew0172) as dose 2, single for covid-19 immunisation; covid-19 vaccine mrna (mrna 1273) (MODERNA COVID-19 VACCINE), administered in arm left, administration date 18Dec2021 (Lot number: 070H21A) as dose 3 (booster), single for covid-19 immunisation. The patient's relevant medical history was not reported. Concomitant medication(s) included: ESTRADIOL. The following information was reported: INTERCHANGE OF VACCINE PRODUCTS (non-serious), outcome "unknown", described as "Dose 1; 13Mar2021, Dose 2; 22Apr2021 and booster Moderna Covid-19 vaccine: 18Dec2021"; HEART RATE ABNORMAL (non-serious), outcome "not recovered", described as "I am a collegiate runner capable to run 4min30sec miles at elevated heartbeats. Since having my shots i can barely run 7 min miles and my heartrate is 175-180 BPM."; FATIGUE (non-serious), outcome "not recovered", described as "I am fatigued continuously"; ASTHENIA (non-serious), outcome "not recovered", described as "I find that I have minimal energy"; BLOOD LACTIC ACID INCREASED (non-serious), outcome "not recovered", described as "seem to have lactic acid buildup in arms". The events "i am a collegiate runner capable to run 4min30sec miles at elevated heartbeats. since having my shots i can barely run 7 min miles and my heartrate is 175-180 bpm.", "i am fatigued continuously", "i find that i have minimal energy" and "seem to have lactic acid buildup in arms" were evaluated at the physician office visit. Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were not taken as a result of heart rate abnormal, fatigue, asthenia, blood lactic acid increased.  Additional information: The patient did not take any other vaccine in four weeks prior COVID -19 vaccine. She was not diagnosed with COVID prior vaccination and not tested with COVID post vaccination. I am a collegiate runner capable to run 4min30sec miles at elevated heartbeats. Since having my shots i can barely run 7 min miles and my heartrate is 175-180 BPM. I am fatigued continuously when exercising. I find that I have minimal energy, and seem to have lactic acid buildup in arms (very unusual) when trying to run. MY body is not recovering after a workout. I am 23-year-old and should recover in same/next day as I have been for past 10-15 years while running track or swimming. I need to have some testing performed to understand what is happening to my heart. to my recovery. I am a world class athlete who has been trying to compete on a team, with passion and drive, but with setback on stamina and intensity.  No follow-up attempts are possible. No further information is expected.